<html xmlns="http://www.w3.org/1999/xhtml"><head></head><body><section><h1>歴史</h1><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="1" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[1]</anchor-end> <cite>IRC logs: freenode / #whatwg / 20100121</cite>
(<time>2010-01-23 15:13:04 +09:00</time> 版)
<anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="http://krijnhoetmer.nl/irc-logs/whatwg/20100121#l-168">http://krijnhoetmer.nl/irc-logs/whatwg/20100121#l-168</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="2" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[2]</anchor-end> <cite>IRC logs: freenode / #whatwg / 20110609</cite>
( (<time>2011-06-16 23:01:17 +09:00</time> 版))
<anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="http://krijnhoetmer.nl/irc-logs/whatwg/20110609">http://krijnhoetmer.nl/irc-logs/whatwg/20110609</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="3" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[3]</anchor-end> <cite xml:lang="en">Web Applications 1.0 r6668        Redefine itemtype='' to allow multiple types if they share the same vocabulary. This was by far the most frequently made request at the recent schema.org event</cite>
( (<time>2011-10-12 09:13:00 +09:00</time> 版))
<anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="http://html5.org/tools/web-apps-tracker?from=6667&amp;to=6668">http://html5.org/tools/web-apps-tracker?from=6667&amp;to=6668</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="4" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[4]</anchor-end> <cite xml:lang="en">Web Applications 1.0 r6793  itemtype can't be empty</cite>
( (<time>2011-11-01 12:13:00 +09:00</time> 版))
<anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="http://html5.org/tools/web-apps-tracker?from=6792&amp;to=6793">http://html5.org/tools/web-apps-tracker?from=6792&amp;to=6793</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="5" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[5]</anchor-end> <cite xml:lang="en">Web Applications 1.0 r6807      Remove the requirement that UAs check that item types are syntactically correct after splitting the itemtype='' attribute.</cite>
( (<time>2011-11-02 01:27:00 +09:00</time> 版))
<anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="http://html5.org/tools/web-apps-tracker?from=6806&amp;to=6807">http://html5.org/tools/web-apps-tracker?from=6806&amp;to=6807</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="6" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[6]</anchor-end> <cite xml:lang="en">Web Applications 1.0 r4066 Update microdata based on results of usability study</cite>
( (<time>2009-10-03 06:44:00 +09:00</time> 版))
<anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="http://html5.org/tools/web-apps-tracker?from=4065&amp;to=4066">http://html5.org/tools/web-apps-tracker?from=4065&amp;to=4066</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="7" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[7]</anchor-end> <cite xml:lang="en">Fix #208: remove the Microdata API · whatwg/html@2aaecb8</cite> (<time>2015-10-07 20:13:43 +09:00</time> 版) <anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://github.com/whatwg/html/commit/2aaecb89900b875b9ee8357fa8bccf48477358bb">https://github.com/whatwg/html/commit/2aaecb89900b875b9ee8357fa8bccf48477358bb</anchor-external></p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="8" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[8]</anchor-end> 
<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">Google Search Console</anchor>
の(自動)チェッカーは
<code>itemtype</code>
に <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">Schema.org</anchor>
でない未知の値が指定されているとエラーを出してきます。警告ではなくエラーです。
何もしてなくても検出するといちいちメールで通知してきます。</p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="9" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[9]</anchor-end> 
<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">Schema.org</anchor> でなくても <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">HTML</anchor> 的にはまったく正当なのに、
<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">Google</anchor> が知らないからといってエラーにするのは迷惑すぎませんか。
<time>2023-01-15T02:13:02.0Z</time></p></section></body></html>